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Unformatted text preview: ES icon will benefit from the use of the Engineering Equation Solver (EES), while problems labeled with a
computer disk may require the use of a computer. The standard
end-of-chapter problems 6.1 to 6.160 (categorized in the problem
list below) are followed by word problems W6.1 to W6.5, fundamentals of engineering exam problems FE6.1 to FE6.15, comprehensive problems C6.1 to C6.5, and design projects D6.1 and D6.2. P6.5 For flow of SAE 10 oil through a 5-cm-diameter pipe, from
Fig. A.1, for what flow rate in m3/h would we expect transition to turbulence at (a) 20°C and (b) 100°C?
In flow past a body or wall, early transition to turbulence
can be induced by placing a trip wire on the wall across the
flow, as in Fig. P6.5. If the trip wire in Fig. P6.5 is placed
where the local velocity is U, it will trigger turbulence if
850, where d is the wire diameter [3, p. 386]. If the
sphere diameter is 20 cm and transition is observed at ReD
90,000, what is the diameter of the trip wire in mm?
Trip wire d Problem distribution
Section Topic Problems 6.1
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- Spring '08